154221349842 has 40 divisors (see below), whose sum is σ = 394937216256. Its totient is φ = 44063242488.

The previous prime is 154221349829. The next prime is 154221349847. The reversal of 154221349842 is 248943122451.

154221349842 is a `hidden beast` number, since 1 + 5 + 4 + 221 + 349 + 84 + 2 = 666.

154221349842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (154221349847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 67997698 + ... + 67999965.

Almost surely, 2^154221349842 is an apocalyptic number.

154221349842 is an abundant number, since it is smaller than the sum of its proper divisors (240715866414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154221349842 is a wasteful number, since it uses less digits than its factorization.

154221349842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135997684 (or 135997675 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 154221349842 in words is "one hundred fifty-four billion, two hundred twenty-one million, three hundred forty-nine thousand, eight hundred forty-two".